import assert from "assert";
import { RawEvent, NormalizedEvent } from "../../types";

const getText = (event: RawEvent) => {
  switch (event.type) {
    case "event":
      return event.name;
    case "page":
      return `Viewed Page '${event.data.title}'`;
    case "sent_action":
    case "failed_action":
    case "attempted_action":
      return `${event.type.split("_")[0]} ${event.delivery_type || ""}`;
    case "attribute_change":
      return "Attributes Updated";
    default:
      return `${event.type
        .split("_")
        .map(str => str.charAt(0).toUpperCase() + str.slice(1))
        .join(" ")}`;
  }
};

const getDirection = (event: RawEvent) =>
  ({
    event: "inbound",
    failed_action: "outbound",
    attempted_action: "outbound",
    sent_action: "outbound",
    page: "inbound",
    sent_email: "outbound",
    delivered_email: "outbound"
  }[event.type] || null);

const getHref = (event: RawEvent) =>
  ({
    attempted_action: `https://fly.customer.io/env/1/outbox/deliveries/${event.delivery_id}`,
    sent_action: `https://fly.customer.io/env/1/outbox/deliveries/${event.delivery_id}`,
    failed_action: `https://fly.customer.io/env/1/outbox/deliveries/${event.delivery_id}`
  }[event.type] ||
  `https://fly.customer.io/env/1/people/${event.customer_id}/activity`);

export default (event: RawEvent): NormalizedEvent<"customer_io"> => {
  assert(event, `Customer.io:Activities null event: ${event}`);
  assert(
    event.id,
    `Customer.io:Activities event is missing the required field id ${event}`
  );
  assert(
    event.timestamp,
    `Customer.io:Activities event is missing the required field timestamp ${event}`
  );

  return {
    id: `customer_io|${event.id}`,
    ts: 1000 * event.timestamp,
    user_info: {
      user_id: event.customer_id,
      source_user_id: null,
      name: null,
      email: null,
      ip: null,
      avatar: null,
      nickname: null,
      phone: null,
      city: null,
      continent_code: null,
      country: null,
      postal_code: null,
      region: null,
      timezone: null,
      country_code: null,
      address_line1: null,
      address_line2: null,
      user_agent: null,
      is_employee: null,
      title: null,
      birthday: null,
      company: {
        name: null,
        id: null,
        industry: null,
        employee_count: null,
        plan: null
      },
      created_at: null,
      age: null,
      gender: null,
      website: null,
      custom_attributes: null
    },
    text: getText(event),
    href: getHref(event),
    is_bad: ["failed_action", "dropped_email", "attemped_action"].includes(
      event.type
    ),
    direction: getDirection(event),
    source: "customer_io",
    stream: "activities"
  };
};